Since we have so many pitchers that will not or should not go over 75 or 80 pitches in starts, it makes sense to piggyback, for a while.
Bello
Paxton
Whitlock
Houck has struggles after 18 batters
If we have 2 piggyback going, at the same time, it can help the pen, if they go 8-9 IP, combined, or use up too many of the 13 slots on SP'ers, if they can't go 7-8, combined.
Ideally, I'd love to see Houck be the one that goes to the pen, but we need the other SP'ers to start doing the same or better than he has done, so far.